<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
</head>
<body>
    <header>
        页面的头部
    </header> 
    <nav>导航条</nav>
    <aside>侧栏</aside>
    <section>一个区块</section>
    <section>一个区块</section>
    <section>一个区块</section>
    

    <footer>页脚</footer>
</body>
</html>